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kafka.go
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kafka.go
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package queue
import (
"context"
"fmt"
"time"
"github.com/longpi1/gopkg/libary/log"
"github.com/IBM/sarama"
)
type Kafka struct {
Partitions int32
producerIns sarama.AsyncProducer
consumerIns sarama.ConsumerGroup
}
type KafkaConfig struct {
ClientId string
Brokers []string
GroupID string
Partitions int32
Replication int16
Version string
UserName string
Password string
}
// SendMsg 按字符串类型生产数据
func (r *Kafka) SendMsg(topic string, body string) (msg Msg, err error) {
return r.SendByteMsg(topic, []byte(body))
}
// SendByteMsg 生产数据
func (r *Kafka) SendByteMsg(topic string, body []byte) (msg Msg, err error) {
producerMessage := &sarama.ProducerMessage{
Topic: topic,
Value: sarama.ByteEncoder(body),
Timestamp: time.Now(),
}
if r.producerIns == nil {
err = fmt.Errorf("comment kafka producerIns is nil")
return
}
r.producerIns.Input() <- producerMessage
sendCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
select {
case info := <-r.producerIns.Successes():
return Msg{
RunType: SendMsg,
Topic: info.Topic,
Offset: info.Offset,
Partition: info.Partition,
Timestamp: info.Timestamp,
}, nil
case fail := <-r.producerIns.Errors():
if nil != fail {
return msg, fail.Err
}
case <-sendCtx.Done():
return msg, fmt.Errorf("send mqMst timeout")
}
return msg, nil
}
func (r *Kafka) SendDelayMsg(topic string, body string, delaySecond int64) (msg Msg, err error) {
return
}
// ListenReceiveMsgDo 消费数据
func (r *Kafka) ListenReceiveMsgDo(topic string, receiveDo func(msg Msg)) (err error) {
if r.consumerIns == nil {
return fmt.Errorf("comment kafka consumer not register")
}
consumer := KaConsumer{
ready: make(chan bool),
receiveDoFun: receiveDo,
}
consumerCtx, cancel := context.WithCancel(context.Background())
go func(consumerCtx context.Context) {
for {
if err = r.consumerIns.Consume(consumerCtx, []string{topic}, &consumer); err != nil {
log.Error("kafka Error from consumer, err%+v", err)
}
if consumerCtx.Err() != nil {
log.Error(fmt.Sprintf("kafka consoumer stop : %v", consumerCtx.Err()))
return
}
consumer.ready = make(chan bool)
}
}(consumerCtx)
// await till the consumer has been set up
<-consumer.ready
log.Debug("kafka consumer up and running!...")
func(args ...interface{}) {
log.Debug("kafka consumer close...")
cancel()
if err = r.consumerIns.Close(); err != nil {
log.Error("kafka Error closing client, err:%+v", err)
}
}()
return
}
// RegisterKafkaConsumer 注册消费者
func RegisterKafkaConsumer(connOpt KafkaConfig) (client Consumer, err error) {
mqIns := &Kafka{}
kfkVersion, err := sarama.ParseKafkaVersion(connOpt.Version)
if err != nil {
return
}
if !validateVersion(kfkVersion) {
kfkVersion = sarama.V2_4_0_0
}
brokers := connOpt.Brokers
conf := sarama.NewConfig()
conf.Consumer.Return.Errors = true
conf.Version = kfkVersion
if connOpt.UserName != "" {
conf.Net.SASL.Enable = true
conf.Net.SASL.User = connOpt.UserName
conf.Net.SASL.Password = connOpt.Password
}
// 默认按随机方式消费
conf.Consumer.Group.Rebalance.Strategy = sarama.BalanceStrategyRange
conf.Consumer.Offsets.Initial = sarama.OffsetNewest
conf.Consumer.Offsets.AutoCommit.Interval = 10 * time.Millisecond
conf.ClientID = connOpt.ClientId
consumerClient, err := sarama.NewConsumerGroup(brokers, connOpt.GroupID, conf)
if err != nil {
return
}
mqIns.consumerIns = consumerClient
return mqIns, err
}
// RegisterKafkaProducer 注册并启动生产者接口实现
func RegisterKafkaProducer(connOpt KafkaConfig) (client Producer, err error) {
mqIns := &Kafka{}
connOpt.ClientId = "producer"
// 这里如果使用go程需要处理chan同步问题
if err = doRegisterKafkaProducer(connOpt, mqIns); err != nil {
return nil, err
}
return mqIns, nil
}
// doRegisterKafkaProducer 注册同步类型实例
func doRegisterKafkaProducer(connOpt KafkaConfig, mqIns *Kafka) (err error) {
kfkVersion, err := sarama.ParseKafkaVersion(connOpt.Version)
if err != nil {
return
}
if !validateVersion(kfkVersion) {
kfkVersion = sarama.V2_4_0_0
}
brokers := connOpt.Brokers
conf := sarama.NewConfig()
// 等待服务器所有副本都保存成功后的响应
conf.Producer.RequiredAcks = sarama.WaitForAll
// 随机向partition发送消息
conf.Producer.Partitioner = sarama.NewRandomPartitioner
// 是否等待成功和失败后的响应,只有上面的RequireAcks设置不是NoReponse这里才有用.
conf.Producer.Return.Successes = true
conf.Producer.Return.Errors = true
conf.Producer.Compression = sarama.CompressionNone
conf.ClientID = connOpt.ClientId
conf.Version = kfkVersion
if connOpt.UserName != "" {
conf.Net.SASL.Enable = true
conf.Net.SASL.User = connOpt.UserName
conf.Net.SASL.Password = connOpt.Password
}
mqIns.producerIns, err = sarama.NewAsyncProducer(brokers, conf)
if err != nil {
return
}
func(args ...interface{}) {
log.Info("kafka producer AsyncClose...")
mqIns.producerIns.AsyncClose()
}()
return
}
// validateVersion 验证版本是否有效
func validateVersion(version sarama.KafkaVersion) bool {
for _, item := range sarama.SupportedVersions {
if version.String() == item.String() {
return true
}
}
return false
}
type KaConsumer struct {
ready chan bool
receiveDoFun func(msg Msg)
}
// Setup is run at the beginning of a new session, before ConsumeClaim
func (consumer *KaConsumer) Setup(sarama.ConsumerGroupSession) error {
// Mark the consumer as ready
close(consumer.ready)
return nil
}
// Cleanup is run at the end of a session, once all ConsumeClaim goroutines have exited
func (consumer *KaConsumer) Cleanup(sarama.ConsumerGroupSession) error {
return nil
}
// ConsumeClaim must start a consumer loop of ConsumerGroupClaim's Messages().
func (consumer *KaConsumer) ConsumeClaim(session sarama.ConsumerGroupSession, claim sarama.ConsumerGroupClaim) error {
// NOTE:
// Do not move the code below to a goroutine.
// The `ConsumeClaim` itself is called within a goroutine, see:
// https://github.com/Shopify/sarama/blob/master/consumer_group.go#L27-L29
// `ConsumeClaim` 方法已经是 goroutine 调用 不要在该方法内进行 goroutine
for message := range claim.Messages() {
consumer.receiveDoFun(Msg{
RunType: ReceiveMsg,
Topic: message.Topic,
Body: message.Value,
Offset: message.Offset,
Timestamp: message.Timestamp,
Partition: message.Partition,
})
session.MarkMessage(message, "")
}
return nil
}